<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>绝对定位-居中</title>
  <style>
    img {
      position: absolute;
      left: 50%;
      top: 50%;

      margin-left: -365px;
      margin-top: -127px;

      /* 方便： 50% 就是自己宽高的一半 */
      /*transform: translate(-50%, -50%);*/
    }
  </style>
</head>
<body>
  <img src="./images/login.webp" alt="">
</body>
</html>